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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>获取数组length属性值</title>
</head>
<body>
<script type="text/javascript">
   var arr = [3, 8, 19];
   var len = arr.length; //获取arr数组的length属性值，并赋值给len变量
   console.log(len);
</script>
</body>
</html>
